Alarms

G - Physics – 08 – B

Patent

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G08B 7/06 (2006.01)

Patent

CA 2270984

An alarm device (10) incorporates a sounder (11) and a strobe (12). The sounder and the strobe are controlled by a circuit board (17) that is located within a single flameproof housing (13). A pressure unit (23) produces the sound for the device with the sound passing through a sintered disc (24) into an upwardly and outwardly diverging cone (25) from the top of which the sound is reflected outwardly and downwardly within a dome (26). A ramp (27) then assists in reflecting and emitting the sound.

La présente invention a trait à un système d'alarme (10) qui se compose d'une sonnerie (11) et d'un dispositif à impulsions lumineuses. Une carte imprimée (17) située à l'intérieur d'un unique logement ignifuge (13) commande la sonnerie et ledit dispositif. Une unité de pression (23) produit le son pour le système, son qui traverse une plaque frittée (24) pour arriver dans un cône qui s'élargit vers le haut en donnant sur l'extérieur (25) et au sommet duquel le son est réfléchi vers l'extérieur et vers le bas d'un dôme (26). Une rampe (27) aide ensuite à réfléchir et à émettre le son.

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